Alert archive / Louisiana / Tornado Warnings in 1997
Tornado Warning 20, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at Nov 21, 1997, 1:41 PM CST for Saint Tammany Parish, Louisiana. It was in force for 49 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Nov 21, 1997, 1:41 PM CST (19:41 UTC)
- Expired
- Nov 21, 1997, 2:30 PM CST
- In force
- 49 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Saint Tammany Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 21, 2:18 PM CST | Tornado F1 | Talisheek, LA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Nov 21, 11:15 AM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 7.7 hours before the alert went out and 30 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 20 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 981 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 211940 RRA TORNEW LAC103-212030- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 141 PM CST FRI NOV 21 1997 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 230 PM CST FOR RESIDENTS IN THE FOLLOWING LOCATION... IN SOUTHEAST LOUISIANA ...NORTHERN ST. TAMMANY PARISH AT 138 PM CST STATE POLICE REPORT A TORNADO 1 MILE EAST OF THE ST TAMMANY...TANGIPAHOA PARISH LINE. RAzDAR CONFIRMS A SEVERE THUNDERSTORM IN THIS AREA MOVING EAST AT 40 MILES AN HOUR. TOWNS IN THE PATH OF THE TORNADO SEVERE THUNDERRSTORM INCLUDE COVINGTON ... ABITA SPRINGS AND MADISONVILLE. TAKE COVER NOW! &
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 21, 10:49 AM CST | Severe Thunderstorm Warning | LIX | East Feliciana, Pointe Coupee, West Feliciana | 41 min |
| Nov 21, 12:12 PM CST | Severe Thunderstorm Warning | LIX | Washington | 48 min |
| Nov 21, 1:01 PM CST | Severe Thunderstorm Warning | LIX | Livingston, Tangipahoa | 44 min |
| Nov 21, 1:20 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 40 min |
Nearby
Tornado Warnings in Louisiana, 1997Every tornado warning in 1997Tornadoes in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.